This variation of making ice ornaments uses snow as a casting mold. Casting ice ornaments in snow introduces young children to some of the basic principles that are used in casting sculpture. Casting is a process used by artists who work with materials such as glass, cement, ceramics and metal. For this method of making ice ornaments, the mold is created by carving out a shape in the snow and lining the shape with either aluminum foil or a plastic bag. Lining the shape is necessary to prevent the water from soaking into the snow. Kids can experiment with the shape, size and depth of the snow mold.